rac-(2R,3S,3aR,6S,7aR)-3-(3-((tert-butoxycarbonyl)amino)propyl)-3-hydroxy-3a-(3-hydroxypropyl)-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-2-yl acetate

rac-(4aR,5S,6aS,8R,10aR)-4a-(3-aminopropyl)-8-methyl-3-oxooctahydro-1H,6H-spiro[indeno[1,7a-b]pyran-10,2'-[1,3]dioxolan]-5-yl acetate

rac-tert-butyl (3-((3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-6-methyl-1,3a,5,6,7,7a-hexahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl)propyl)carbamate

3-[(3aS,6R,7aS)-3-(3-Amino-propyl)-6-methyl-4-oxo-1,4,5,6,7,7a-hexahydro-inden-3a-yl]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester; compound with trifluoro-acetic acid

rac-tert-butyl (3-((2R,3S,3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-2,3-dihydroxy-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl)propyl)carbamate

2,2,2-Trifluoro-1-((1S,2S,4R,6S)-2-hydroxy-4-methyl-13-aza-tricyclo[7.7.0.01,6]hexadec-8-en-13-yl)-ethanone

rac-(2R,3S,3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-3-(3-((tert-butoxycarbonyl)amino)propyl)-3-hydroxy-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-2-yl acetate

(1S,4R,6S)-4-Methyl-13-aza-tricyclo[7.7.0.01,6]hexadec-8-ene-2,14-dione

(1S,2S,4R,6S)-2-Hydroxy-4-methyl-13-aza-tricyclo[7.7.0.01,6]hexadec-8-en-14-one